12122110412557 has 2 divisors, whose sum is σ = 12122110412558. Its totient is φ = 12122110412556.

The previous prime is 12122110412501. The next prime is 12122110412563. The reversal of 12122110412557 is 75521401122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12075145454761 + 46964957796 = 3474931^2 + 216714^2 .

It is an emirp because it is prime and its reverse (75521401122121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12122110412557 - 2¹⁵ = 12122110379789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122110482557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061055206278 + 6061055206279.

It is an arithmetic number, because the mean of its divisors is an integer number (6061055206279).

Almost surely, 2^{12122110412557} is an apocalyptic number.

It is an amenable number.

12122110412557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122110412557 is an equidigital number, since it uses as much as digits as its factorization.

12122110412557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 34.

Adding to 12122110412557 its reverse (75521401122121), we get a palindrome (87643511534678).

The spelling of 12122110412557 in words is "twelve trillion, one hundred twenty-two billion, one hundred ten million, four hundred twelve thousand, five hundred fifty-seven".